M achines



M. GRANT 86 J. J. HENRY. Wheat-Cracking Machine.

No. I9-8-,605. Patented Dec. 25,1877.

WITNESSES,

N. PETERS, PHOTO-LITHOGRAPHER. WASHINGTON, D C.

" Specification form (5T0 all mamaay concern: 1* Y x i Be itknownthatwe, MALooL GRANT and w JOHN. JOSEPH HENRY,both of'jthe city ofBalf .timore, State of Maryland, have inyented certain new and usefulImprovements inMachines or Cracking" Wheat andwe hereb declare $Y f bd aib lqws; refe e e hed'll t a y n -d aw n s; h l 1 ure 1 r p es nt a f nleven said machine,"the cover beinglremovedj in or?- d o w h li e na t ntme ion 0f. "device; Fig.2,aiplan'view of the same, the r n opp r beirem ds d a front elevation of thrijcovencasting. l I

The objectlof our invention is to fiirnish a machine for-produ'ci ng ina rapidand easy ,manner a superior gradeof what is known as crackedwheat,- now extensively used as an article of food; i iilnjcracking'th'e g ins it is desirable-that thefsame should be, merelysubj ected to pressre, and not scratched or abraded in anyway. A y gr dg i ac o fon. t .par .-,0f, I th mchine i results in "diminishingtheiquantity of n od c in h orm f tra k d. whea (a siderable portionbeing reduced 1 to "coarse flo'u'r,) besides impairing the appearance ofp the product, and, also," as a natural consequen e, its w hi In *n sshr n I o r.m h n -th am er Su je e tq 's mr e pressure,whereb 't eyga eea d tofcracl;

int a men s een on th s de me P rts. a original gloss. I in passin'gj thappreciable, I qlivered in the r d wh a 1 t 'las mpanmn which'originally consti hemec ei elmost rly'th'e'-whol e of it {being dethedesired producetale-silt ter, the two being'held together by means of vlL a pair of 1 screws, '5 i passingthrough the lugs x a a a (1 (Withinthe box are journaled the rolls B B., havingtheir cylindricalisurfacesfinely milled,'as shown inFig. 2,\thel-milling ndinei ear Th m lled P 1-ne or b9 he same tobefully, clearly, and emcnyae. v

n1 tree: ith r i i er, the loss-of material c t ngs, n itut ng a i einge-c of V the. formerfitting around the; edge of the latto the edge onyeither side. 9 15.15,

the; 198,605, dated December 25, 1877; application filed I November 21,1377.

countersunk beneath the cylindrical surfaces of the rolls, so that whentheir unmilled surfaces are brought in contact a space will be leftbetween the milled portions, which space will determine the size of theparticles of cracked wheat.

The bearings of one of the rolls are made may be taken up from time totime. The

shaft 1) of one of the rolls terminates in the ordinary square orpolygonal head, for the attachment of a crank, E.

It will be observed that the upper edges of the castings A A, which areimmediately beneath the hopper O, are extended into the interior of thebox a distance equal to the width of the unmilled edges of the rolls,the parts a a thus formed being beveled, as shown, in order to deliverthe grain freely to the rolls; the object of the described constructionbeing to prevent any grains from falling between the unmilled edges ofthe rolls.

The casting A is secured to a suitable support by means of screws e e e,to insert which it is, of course, necessary to take the box apart andremove the rolls.

Within the casting A are secured a pair of scrapers, D D, attached bymeans of screws 9 g. The scrapers are arranged so as to press slightlyupon the milled portions of the rolls, and remove any particles of grainwhich may adhere thereto.

The operation of the device is evident from the foregoing description ofits construction. The hopper 0 being fed with grain, and'the rolls beingpressed together by means of the screws -c c, and caused to revolve bythe crank E, the grain passes uniformly between the rolls and out at thebottom of the machine.

It is obvious that, instead of driving the roll B by frictional contactwith the other roll, the two may be geared together by ordinary pinions.

- While in the drawings we have illustrated butone roll as beingrecessed upon the milled surface, both may be so constructed.

The object in milling the rolls is simply to give them a hold upon thegrain, and as it is desirable that the surface of the grain should notbe scratched to any great extent, the milling should be quite fine.

Whilewe have illustrated the milling as consistingof fine lines crossingat right angles, other forms of roughening, such as stippling, willanswer, the object being as stated, to cause the rolls to seize and drawthe grains between them. I

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

,1. In a machine for cracking wheat, a pair of rolls the cylindricalsurfaces of which are recessed and milled upon one or both of the rolls,substantially as described.

2. In a machine for cracking wheat, a pair of rolls having a part oftheir cy1i d i 1 Sup V 1 face milled, in combination with a chuteextended inwardly, in order to cover only the unmilled portion of therolls, as and for the purpose described.

L. D. WILLIAM W. A. BERTRAM.

